Luminescence of rare earth ions activated YNb0.5M0.5O4 (MÂ =Â P, V) phosphors by chemical co-precipitation composing hybrid precursors

A novel synthesis technology was applied to fabricate YP0.5Nb0.5O4:RE3+ and YNb0.5V0.5O4:RE3+ phosphors. In this method, the rare earth coordination polymers with salicylic acid were used as precursors and the polyethylene glycol (PEG) was used as dispersing media. By a modified co-precipitation process, the hybrid precursors have been prepared, and then were calcinated to obtain the samples. Both SEM indicated that the particles present cobble-like crystalline state, especially YNb0.5V0.5O4:RE3+ phosphors. Besides this, crystalline grain sizes were in the range of around 0.5-1 μm. The optical properties of all the powder presented that the characteristic transitions of rare earth ions were detected.